Auxiliary window



H. M. LYNCH El AL Sept. 19, 1939.

AUXILIARY WINDOW Filed April 2o, 195e FIGA.

y INVENTORS 'HENRY M. LYNCH WINFIELD L; HOLDEN A TTORNEYS :metal of a non-tarnishing nature.

Patented Sept. 19, 1939 UNITED STATES PATENT OFFICE AUXILIARY WINDOW Michigan Application April 2o, 1936, serial No. v75,2177

3 Claims.

The invention relates to auxiliary windows, such as used for storm windows, for better heat insulation and for preventing condensation of moisture on the inner window. It is the object of the invention to obtain a construction which may be easily applied to ordinary window installations and particularly those having metallic window sashes. It is a further object to provide for the application of the auxiliary window on the outside of the main window and still further, it is an object to obtain a construction which does not interfere with the opening of the main window, but which forms a sealed joint in the closed position thereof. With these and other objects in view, the invention consists in the construction as hereinafter set forth.

In the drawing:

Figure 1 is an elevation of a window to which our auxiliary window is applied;

Figure 2 is a section through the corner portion of the auxiliary window sash illustrating the manner of joining the mitered sides thereof;

Figure 3 is a perspective view of -the reinforcing and coupling angle for joining the sides;

Figure 4 is a horizontal section through one of the rails of the auxiliary sash illustrating the connection and sealing means between the same .and the main sash;

Figure 5 is a section of the hinge bracket sje- Vcured to the main sash;

the same, also, means for attachment of this iframe to the sash of the main window and for forming a weather-proof ,joint therebetween.

i More in detail, the frame is constructed of Vrail members A, preferably for-med of bars of extruded These bars in cross-section have a laterally opening channel portion A', a flange A2 extending in a plane sublengths from these extruded bars being preferably providedwith mit'ered ends for forming the corners of the frame. The rails are then secured to each other by reinforcing angle members B which t within the channels A and are riveted or otherwise secured. This will form a rectangular frame which is held from distortion by the reinforcement of the angle bars B. The glass C is placed in the frame adjacent to the flange A2 and is then secured in this position by splines D engaging the grooves in the U-shaped portions A3. Resilient packing material E is placed around the margin of the glassto hold the same out of contact-With the metal of the frame and to provide the necessary resiliency permitting differential expansion and vcontraction of the glass and the metal.

In mounting the glass within the frame after applying the packing material to the margin of the glass, it is laid against the flange A2 and the splines D are. successively inserted in the grooves of the U-shaped portion A3. These splines preferably have square ends and overlap each other in the same plane at the corners of the frame, while the last spline D is of a length to extend onlybetween `.the splines at the opposite ends thereof. The. packing material is sufficiently rein position they will be frictionallyvheld from aC- cidental displacement. Y

j silient so that when theseV splines are once placed Y The frame oriframes are mounted upon the i' main sash in any suitable way, but preferably by hinging vone of the rails of the auxiliary frame to the lcorresponding rail of the sash and securing the other rails `by screws. A sealing joint is formed between the sash and frame by inserting v within the channel A', a strip of packing material F, such as cork composition, and by also placing strips of similar material G against the rails of the sash to which they are secured, preferably by cementing. The hinge connection is formed by an angle bracket H secured to the sash rail and a hinge member I secured to the rail of the auxiliary sash. These hinge members may and preferably are cut from extruded bars of the same cross-section, and the member I is preferably provided with a shoulder I for engaging the outer edge of the frame rail and holding the hinge properly aligned therewith. A hinge pivot or pin J engages the eyes of the two hinge members and forms the connection therebetween. The other rails of the frame are secured to the corresponding rails of the sash by screws K, which extend through the channels A and packing material arranged therein, and engage threaded apertures in the sash rail.

With the construction as above described, it will be understood that the main window may be externallycovered either by a single or by a plurality of these auxiliary frames. Where, as is usually the case with metallic sashes, there are hinge sections for opening the window, these hinge sections are provided with auxiliary sash frames of corresponding shape. Thus, as shown in Figure 1, the main window L has a central hinge section L and stationary sections L2, L3'on opposite sides thereof. The central section L is, therefore, the only one that can be opened, but the auxiliary frames which correspond in area to the sections L2 and L3 are preferably hinged thereto in the manner above described to permit of opening at any time for cleaning of the windows or for any other purpose.

Our improved auxiliary sash is very efficient for heat insulation inasmuch as there is no metal to metal contact between the main and the auX- iliary sash other than through the securing screws and hinges. The adjacent rails in the two sashes are separated from each other by the packing strips which are formed of material of relatively low thermal conductivity, while the space between the inner and outer glass is lled with air, forming effective heat insulation. Furthermore, as the strips of packing material G are cemented to the sash rails they will form a sealing joint therewith, while their outer surfaces extend in a plane and form a sealing joint with the strips F. Thus, where there are any projections on the sash rail, such as hinge or latch connections, these Vwill be covered'by the strips G. Still another advantage is that the strips G are of rconsiderably greater Width than the strips F and may cover the entire outer surface of the sash rail to which they are applied. This forms effective heat insulation even for those portions of the rail which are not completely covered 'by the auxiliary sash.

Where the auxiliary sash is applied to a swinging section or ventilator of the main Window, the .strip G which is' cemented to the swinging rail of' the Window, preferably projects slightly be- "yond the outer edge thereofk and is provided with va beveled surface G2. This, when the ventilator is closed, will abut against a corresponding beveled 'surface of a strip G3 on the stationary sash so as to form a sealing joint therebetween. Thus, in addition'f'to the function of forming thermal insulation, these strips also seal against air leakage.

In Figure '7, we have shown a modified construction of means for uniting the rails of the sash, With this, the mitered ends of the rail sections' are provided with an aperture or recess M in the inner wall of the channel portion A. There is also provided a resilient angle member N having hooks N' at the ends of its opposite arms. This is placed in the channel and. the hooks N' are sprung into engagement with said apertures M, thereby locking the two rails together. This construction permits of more rapid assembly than with the angle members B inasmuch as no rivets or screws are required.

What we claim as our invention is:

1.*In an auxiliary window unit, a sash frame formed of rails having an outer laterally opening channel section, an inwardly extending flange, and a U-shaped portion extending into said channel section and forming a groove parallel with and spaced from said ange, said rails being mitered at their ends, and a reinforcing angle bracket having its arms located in the channels of said rails and secured thereto, said brackets bridging the mitered joint therebetween and holding the sash from distortion.

2. In an auxiliary window unit, a sash frame formed of rails having an outer laterally opening channel section, an inwardly extending flange and a U-shaped portion extending into said channel section and forming a groove parallel with and spaced from said flange, said rails being mitered at their ends, a reinforcing angle bracket having its arms located inv the channels of said rails and secured thereto, said brackets bridging the mitered joint therebetween and holding the sash from distortion, packing strips in said channels and projecting outward therefrom for forming a sealing joint with the main window sash, a window pane Within said sash bearing against said flange, and splines engaging said grooves for retaining said pane.

3. In an auxiliary window unit, a sash frame formed of rails having an outer laterally opening channel section, an inwardly extending flange and a groove portion spaced from said flange for receivinga spline, said rails being mitered at Vtheir ends for engagement with each other and an angle member for securing said rails to each other',said angle member being positioned adjacent to the inner wall of said channel section being resilient and being provided with hooks at gagement with recesses in said inner wall.

HENRY M. LYNCH. WINFIELD L. HOLDEN.

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